869770669 has 2 divisors, whose sum is σ = 869770670. Its totient is φ = 869770668.

The previous prime is 869770633. The next prime is 869770717. The reversal of 869770669 is 966077968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864654025 + 5116644 = 29405^2 + 2262^2 .

It is a cyclic number.

It is not a de Polignac number, because 869770669 - 2¹³ = 869762477 is a prime.

It is a super-2 number, since 2×869770669² = 1513002033305415122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869770469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434885334 + 434885335.

It is an arithmetic number, because the mean of its divisors is an integer number (434885335).

Almost surely, 2^869770669 is an apocalyptic number.

It is an amenable number.

869770669 is a deficient number, since it is larger than the sum of its proper divisors (1).

869770669 is an equidigital number, since it uses as much as digits as its factorization.

869770669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The square root of 869770669 is about 29491.8746267510. The cubic root of 869770669 is about 954.5563828719.

The spelling of 869770669 in words is "eight hundred sixty-nine million, seven hundred seventy thousand, six hundred sixty-nine".